There are a series of principles that must be observed in singing: taking care of the voice principle, which is the most important element in singing, and the exercises that a person does for singing can damage the larynx, so one must take care of the voice. Singing should not be practiced when the weather conditions are very dry and hot or very cold. You should not shout because the effect of shouting may remain for several hours in the form of hoarseness. For ordinary people, this hoarseness may last two to three days, but for someone who sings, this effect is very destructive. Never try to return it to its original state with exercise and pressure due to hoarseness, and the best thing to do at this time is to rest and not read. Never use alcoholic beverages because it destroys concentration and damages the larynx. You should avoid drinking cold liquids before singing, and if necessary, drink a few hours before.